New to forums and Sea Doos

I got my GTX Supercharged ski 2 seasons ago. I love it. It rides well and its fast. Well basically I like tuning my cars and stuff and it has transfferred to my ski now. lol.
So basically I was wondering what are the steps...like exhaust, intake, etc. Also, what about the Speedlimiter and Rev limiter. Can I adjust those?
Well thats it for now...I would really appreciate some sort of help.